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224.0 Aluminum vs. AISI 431 Stainless Steel

224.0 aluminum belongs to the aluminum alloys classification, while AISI 431 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 224.0 aluminum and the bottom bar is AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 4.0 to 10
15 to 17
Fatigue Strength, MPa 86 to 120
430 to 610
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 380 to 420
890 to 1380
Tensile Strength: Yield (Proof), MPa 280 to 330
710 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Maximum Temperature: Mechanical, °C 220
850
Melting Completion (Liquidus), °C 650
1510
Melting Onset (Solidus), °C 550
1450
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 120
26
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 95
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 11
9.0
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.3
2.2
Embodied Energy, MJ/kg 160
31
Embodied Water, L/kg 1150
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 35
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 540 to 770
1270 to 2770
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 35 to 38
32 to 50
Strength to Weight: Bending, points 38 to 41
27 to 36
Thermal Diffusivity, mm2/s 47
7.0
Thermal Shock Resistance, points 17 to 18
28 to 43

Alloy Composition

Aluminum (Al), % 93 to 95.2
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 4.5 to 5.5
0
Iron (Fe), % 0 to 0.1
78.2 to 83.8
Manganese (Mn), % 0.2 to 0.5
0 to 1.0
Nickel (Ni), % 0
1.3 to 2.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.060
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.35
0
Vanadium (V), % 0.050 to 0.15
0
Zirconium (Zr), % 0.1 to 0.25
0
Residuals, % 0 to 0.1
0